"Oxygen 4" is an atmospheric audio piece, where the harmony of oxygen is represented through a collection of synth sounds. The soundscape is composed of layered synthesizer samples, each carefully chosen to evoke the sense of the vital element - oxygen. The audio ebbs and flows, mirroring the rhythmic nature of breathing, creating an immersive listening experience. The synth samples are expertly woven together, producing a rich tapestry of sounds that is both complex and pleasing to the ear. The overall effect is a refreshing and invigorating auditory journey, reminiscent of the rejuvenating properties of oxygen itself. The balance between the different elements in the audio is perfect, creating a harmonious blend that is soothing and uplifting at the same time.